Headquarters Daily Report NOVEMBER 12, 1997 *************************************************************************** REPORT NEGATIVE NO INPUT ATTACHED INPUT RECEIVED RECEIVED HEADQUARTERS û REGION I û REGION II û REGION III û REGION IV û PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION II NOV. 12, 1997 Licensee/Facility: Notification: Tennessee Valley Authority MR Number: 2-97-0083 Sequoyah 2 Date: 11/12/97 Soddy-Daisy,Tennessee Dockets: 50-328 PWR/W-4-LP Subject: SEQUOYAH UNIT 2 IDENTIFIED INCONSISTENT CORE FLUX DISTRIBUTION Discussion: On November 5, 1997, Sequoyah Unit 2 identified inconsistent core flux distribution while at 30 percent power following startup from a refueling outage. In consultation with the fuel vendor, Framatome Cogema Fuels, the licensee determined that sixteen new fuel assemblies, with gadolina burnable poison rods, had been loaded into core locations different than planned. The burnable poison rods have two different patterns (eight assemblies each) and the loading procedures had the patterns reversed. This was identified during in-core instrument flux mapping tests. The licensee and vendor imposed a temporary restriction of 75 percent power until the resolution could be determined. The licensee determined that the core reload analysis remained valid with the existing configuration. The licensee also determined that the problem did not represent an unanalyzed condition warranting reporting to the NRC. The only change necessary was to modify the core flux mapping software to match the core characteristics. This was completed as of November 8 and the licensee subsequently increased power to 100 percent. The apparent cause of the problem was incorrect communication from the vendor to the licensee on the loading plan. Contact: Mark S. Lesser (404)562-4560 _